chore: remove the redundant pr number from changelog

Author: Boshen

release-plz.toml

@@ -37,7 +37,7 @@ body = """
                     ({% for link in commit.links %}[{{link.text}}]({{link.href}}) {% endfor -%})\
                 {% endif %}
         {% else -%}
-            - {% if commit.breaking %}[**breaking**] {% endif %}{{ commit.message }}{{ self::username(commit=commit) }}{{ self::pr(commit=commit) }}
+            - {% if commit.breaking %}[**breaking**] {% endif %}{{ commit.message }}{{ self::username(commit=commit) }}
         {% endif -%}
     {% endfor -%}
 {% endfor %}
@@ -50,9 +50,6 @@ body = """
 {%- macro username(commit) -%}
     {% if commit.remote.username %} (by @{{ commit.remote.username }}){% endif -%}
 {% endmacro -%}
-{%- macro pr(commit) -%}
-    {% if commit.remote.pr_number %} - #{{ commit.remote.pr_number }}{% endif -%}
-{% endmacro -%}
 """
 
 commit_parsers = [